Mask for a display unit and display unit for an electronic display board



FIG. 1 is a front elevational view of a mask for display unit and display unit for an electronic display board, showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a front left perspective view thereof;

FIG. 7 is a sectional view thereof, taken along line 7—7 of FIG. 1;

FIG. 8 is a sectional view thereof, taken along line 8—8 of FIG. 7; and,

FIG. 9 is a sectional view thereof, taken along line 9—9 of FIG. 7. 

The ornamental design for a mask for a display unit and display unit for an electronic display board, as shown and described. 